﻿namespace System {

    /// <summary>
    /// 可变的
    /// </summary>
    public interface IChangable : IObject {

        /// <summary>
        /// 当发生改变时
        /// </summary>
        public delegate void ChangedDelegate();

        /// <summary>
        /// 当发生改变时
        /// </summary>
        event ChangedDelegate Changed;
    }
}